Caledonia, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 12.6 °C (high). Annual precipitation averages 948.4 Millimeters. Caledonia is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.4 °C | -4.4 °C | 28.96 mm |
| February | -11.6 °C | -1.9 °C | 27.69 mm |
| March | -4.8 °C | 5.2 °C | 46.74 mm |
| April | 1.7 °C | 12.9 °C | 104.39 mm |
| May | 8.4 °C | 19.7 °C | 120.14 mm |
| June | 14.3 °C | 25 °C | 154.69 mm |
| July | 16.3 °C | 26.9 °C | 106.93 mm |
| August | 15 °C | 25.9 °C | 112.78 mm |
| September | 10.3 °C | 22.1 °C | 95.5 mm |
| October | 3.6 °C | 14.6 °C | 71.12 mm |
| November | -3.1 °C | 5.9 °C | 43.43 mm |
| December | -9.5 °C | -1.3 °C | 36.07 mm |
| Annual | 2.3 °C | 12.6 °C | 948.44 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |